Tektronix WVR5200 Specification And Performance Verification Technical Reference page 65

WVR5200 Waveform Rasterizer Specifications and Performance Verification
3 Gb/s checks (Option 3G only).
1. Connect the TG700 HD3G7 SIGNAL 1 output to the SDI 1A input.
2. Set the HD3G7 to 1080 59.94p format. Select the "100% Color Bars" signal.
On the instrument select input 1A. A Color Bar signal should be displayed.
3. Disconnect the HD3G7 from the SDI 1A input. Connect the cable from the
HD3G7 to the 80 m 3G Cable Clone Input (FFE model, Belden 1694A,
0.3 MHz to 3 GHz).
4. Using a 75 Ω female-to-female BNC adapter and a second cable, connect the
Cable Clone Output to the SDI 1A input.
NOTE.
The 75 Ω BNC adapter should be included with the cable clone set.
5. Select the "SDI Matrix" signal from the TG700 HD3G7.
6. You should see a stable picture and waveform on the instrument display. The
Y Chan and C Chan CRC Error Status on the Video Session screen should
both read OK.
7. Connect additional sections of the 3G Cable Clone into the signal path to
find the longest length of "cable" that does not generate any CRC errors in a
10-second period.
8. The 3G Cable Clone set described in the Required Equipment List simulates
up to 150 m of Belden 1694A when all four sections are connected. If your
instrument does not appear to show CRC errors at this simulated cable length,
reset the CRC Err Secs readout to zero (refresh the active display by pressing
a different display button and then returning to the current display). After
60 seconds check the CRC Err Secs readouts. A "0" reading for both CRCs
indicates that the Cable Accommodation range is ≥150 m of Belden 1694A.
NOTE.
If additional 3G Cable Clone sections are available, the test may be
continued to find the point where CRC errors occur.
9. Add the 3G Cable Clone section lengths to get the total length in meters of
Belden 1694A cable. Divide by 4 to calculate attenuation in dB at 1500 MHz.
10. Record the value in the test record. Acceptable performance is 28 dB or
greater.
11. Starting from step 3, repeat the test for the SDI 1B input (Front Panel input
1B).
12. Repeat this procedure for SDI inputs 2A and 2B starting at step 3.
This completes the SDI Input Equalization Range checks.
Video and General Performance Verification Procedures
51